MIL-PRF-27/173F
REQUIREMENTS: (When numbers in parentheses, i.e., (1-5) are used, they indicate the winding and the
extreme terminals of the winding. When the extreme terminals of two windings are used,
i.e., (6-10), the windings are connected in series, i.e., terminals 7 and 9 are connected.
Electrical ratings: See table I.
Working voltage (peak): 50 V.
Frequency range: 300 Hz to 250 kHz.
Primary dc current (1-5): 0 ampere.
TABLE I. Electrical ratings. 1/
Dash
Primary
Secondary
Primary
Primary
Secondary
Number
Impedance
Impedance
dc resistance
power level
dc resistance
(1-5)
(6-10) 2/
(1-5)
at 1 kHz
(6-10)
(max)
Ohms ct
Ohms
Ohms ±25%
mW
Ohms ±25%
01
25 k
1000/250 Split
2400
40
78
02
1500
600/150 Split
150
75
65
03
150
12/3
16
80
1.85
04
300
600/150
30
80
65
05
400
400/100
45
80
45
06
500
50/12.5
58
80
5.5
07
600
600/150
65
80
65
08
1000
1000/250
110
80
100
09
2000
8000/2000
177
75
745
10
10 k
500/125
900
75
56
11
10 k
1200/300
900
75
100
12
10 k
2000/500
900
75
160
13
10 k
10k/2500
900
75
750
1/ Complete qualification testing and approval to M27/173-01 shall be sufficient to grant qualification
approval to M27/173-02 through -13.
2/ By paralleling the secondary windings, one-fourth of the specified impedance is available.
Design and construction:
Dimensions and configurations: See figure 1.
Duty cycle: Continuous.
Terminals: Type LR (---)E-32-C1, per MIL-STD-1276.
Weight: 1.50 grams, maximum.
Altitude: 150,000 feet, maximum.
2
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